Combined rule and try-square



(No Model.)

G W SNYDER GOMBINED RULE AND TRY SQUARE.

Patented Sept. 15, 1896.

NITED GEORGE W. SNYDER, OF GRAND RAPIDS, MICHIGAN.

COMBINED RULE AND TRY-SQUARE.

SPECIFICATION forming part of Letters Patent No. 567,869, dated Sep mber15, 1896- Applioation filed January 18, 1896. $erial No. 576,011. (Nomodel.)

To all whom, it may concern:

Be it known that I, GEORGE W. SNYDER, a citizen of the United States,residing at Grand Rapids, in the county of Kent and State of Michigan,have invented new and useful Improvements in a Combined Rule and Try-Square, of which the following is a specification.

This invention relates to a combined rule and try-squ are, and has forits object to provide means for stiffening or strengthening the rule,whereby the latter may be made of thin tempered steel, reducing both theweight and cost of the rule, and to combine with such a rule agage-stock having improved means for securing it rigidly on the rule,and also provided with means for adjusting the gage-stock relative tothe rule to determine the angle between the two.

To these ends my invention consists in the features and in thearrangement or construction of parts hereinafter described, referencebeing had to the accompanying drawings, forming apart of thisspecification, wherein- Figure 1 is a side elevation of myimprovedinstrument. Fig. 2 is averticalcross-section on the line 2 2 of Fig. 1.Fig. 3 is a detail sectional view illustrating the adj ustingplate. Fig.i is a horizontal section on the line at 4: of Fig. 3, and Fig. 5 is adetail view of the clamping-bolt.

Referring to the drawings, the numeral 1 indicates the rule, consistingof a thin, flat blade of tempered steel having straight par-' alleledges 2, graduated upon both sides, and provided upon its opposite sideswith longitudinal ribs 3. The ribs 3 are formed integral with the blade1, one or more being arranged upon each side of the blade as the lengthand breadth of the latter may require to strengthen the same.

On the rule 1 are adj ustably secured gagestocks 4 and 5, the gage-stock4 having one edge 6 arranged at a right angle to the rule 1 and itsopposite edge at an angle of fortyfive degrees thereto, while thegage-stock 5 is provided with two oppositely-projecting arms 7, eachdisposed at an angle of fortyfive degrees to the rule 1. The gage-stocks4 and 5 are slotted to straddle the rule 1 and are each provided with ahollow boss 8, in which is fitted a clamping-bolt 9, that is forked orbifurcated at its lower end and providedwith hooked extremities 10,adapted to engage the ribs 3 of the rule, and at its 'upper end isscrew-threaded, as at 11, and is provided with a set-nut 12, that seatsagainst the end of the boss 8, and by means of which the clamping-boltmaybe caused to grasp the ribs 3 firmly and hold the gage-stock rigidlyin place on the rule 1.

In order that the gage-stock 4: may be accurately set at a true rightangle to the rule 1, I arrange in its lower slotted portion a segmentalplate 13, the upper edge of which is formed on the arc of acircle andabuts against a correspondingly-shaped seat 14 on the gagestock 4, andon its under side is formed with a straight-edge 15, that rests upon theedge of the rule 1. The plate 13 is provided with two circular apertures16, through which pass tapered screws 17, that are tapped throughthreaded apertures formed in the lower portion of the gage-stock 4 andregistering with the apertures 16' in the plate 13. By screwing one ofthe screws 17 in and the other screw out it will be evident that theplate 13 will be oscillated upon its arc-shaped seat, thus altering theangle between the edge of the gage-stock and the edge of the rule, andin this manner the gage-stock may be accurately adjusted on the rule.

The manner of using instruments of this character is so well understoodas to render any description thereof unnecessary.

By forming the longitudinal ribs 3 on the rule the latter is greatlystrengthened, rendering it possible to make the rule very thin andlight, and by providing the novel means described for adjusting thegage-stock relative to the rule very accurate work in constructing thegage-stock and rule is not necessary, as the gage-stock may very readilyand accurately be set at the angle desired.

Throughout the foregoing description I have used the word rule asapplied to the blade 1, but the said blade may be simply astraight-edge, the graduations being omitted, and I wish it to beunderstood that by the term rule I also include a straight-edge.

Having described my invention, ,what I claim is- 1. The combination of arule having formed integral therewith a longitudinal rib, with agage-stock movable on the rule, and a forked clamping-screw mounted inthe gage-stock and slidably engaging said longitudinal rib,substantially as described.

2. The combination of a rule having longitudinal ribs formed integraltherewith on its opposite sides, with a gagestock movable on the rule,and a clamping-screw carried by the gage-stock and having a bifurcatedinner end, the two arms or members of which bifurcation embrace the ruleand slidably engage said longitudinal ribs substantially as described.

3. The combination with a rule having longitudinal ribs formed on itsopposite sides, of a slotted gage-stock straddling the rule and providedwith a hollow boss, a forked clamping-screw arranged in said boss andhaving hooked ends engaging the ribs on the rule, and a nut engaging thethreaded end of the clamping-bolt, substantially as described.

4E. The combination with arule, of a slotted gage-stock straddling therule, means for clamping the gage-stock on the rule, a segmentaladjusting-plate arranged in a correspondingly-shaped recess in thegage-stock and having a straight-edge engaging the edge of the rule, andmeans for adjusting said plate on its seat, substantially as describedand for the purpose specified.

5. The combination with a rule, of a slotted gage-stock straddling therule, means for clamping the gage-stock on the rule, a segmental adjustingplate arranged in a correspondingly-shaped recess in thegage-stock and having a straight-edge engaging one edge of the rule,apertures formed in the adjustingplate, threaded apertures formed in thegage-stock and registering with the apertures in the adjusting-plate,and tapered screws tapped in the threaded apertures of the gagestock andpassing through the apertures in the adj usting-plate to oscillate thelatter on its seat and adjust the angle between the gage-stock and rule,substantially as described.

In testimony whereof I have hereunto set my hand in presence of twosubscribing wit- DGSSGS.

GEORGE W. SNYDER. \Vitnesses:

ARTHUR O. DENISON, AMBROSE C. IIINDMAN.

